Means for registering printing machine cylinders



' Dec. 5, 1939. w, P HUCK 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8Sheets-Shee 1 INVENTDRJ.

Dec. 5, 1939', w; E HU K 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Fiied Aug. 12, 1936 aSheets-Sheet 2 INVENTOR Dec. 5, 1939. w. F. HUCK 2,181,894

mums FOR REGISTERING PRINTiNG MACHINE CYLINDERS FiledAugQ 12, 1936 8Sheets-Sheet 3 INVENTOR.

Dec. 5, 1939. w. F. HUCK 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8Sheets-Sheet 4 Dec. 5, 1939. w. F. Huck 2,131,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8Sheets-Sheet 5 INVENTOR.

W.' F HUCK Dec. 5, 1939.

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS 8 Sheets-Sheet 6 FiledAug. 12, 1936 INVENTOR.

Dec. 5, 1939. 4 w. F HUCK 2,181,894 7 MEANS FOR REGISTERING PRINTINGMACHINE CYLINDERS Filed Aug. 12, 1936 4 8 Sheets-Sheet 7 INVENTOR.

7k figwmm Dec. 5, 1939. w HUCK 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8Sheets-Sheet 8 lNvEN'roR Fireman. 5, 1939 UNITED STATES PATENT OFFICEMEANS FOR REGISTERING PRINTING MACHINE CYLINDERS William F. Huck,Richmond Hill, N. Y., assignor to R. Hoe & 00., Inc., New York, N. Y.,a, corporation of New York This invention relates to printing machinesand particularly to that type of printing machine wherein severalimpressions are made in sequence, as for instance, a multi-colorprinting machine.

More particularly, the invention relates to mechanism for adjusting aform cylinder rotatively and axially, to accurately register theprinting, and which is operable if desired from a position remote fromthe cylinder, and while the ma chine is in operation.

The mechanism for adjusting the cylinder includes electrically operateddevices, thus permitting the operation to be controlled from a positionremote from the cylinder, preferably from a convenient position, such asat the delivery end of the machine, whereat an operator may readilyobserve the register of the printed matter. By the use of the principlesand features of this invention, the form cylinder may be immediatelyadjusted to correct improper register of the printed matter, withoutinterrupting the operation of the machine.

One object of this invention is to provide in a printing machineimproved mechanism for rotatively adjusting a cylinder to compensate forirregularities in register of the printed matter.

Another object is to provide in a printing machine improved mechanismfor axially adjusting a cylinder to compensate for irregularities inregister of the printed matter.

Still another object is to provide a mechanism for axially adjusting aform cylinder of a printing machine without interfering with the inkroller drive associated therewith.

A further object is to provide mechanism for substantiallysimultaneously adjusting the form cylinder of a printing machine bothrotatively and axial y and which is adapted for remote control and isoperative during machine operation.

Still further objects include the provision of electrically operablemeans for actuating the cylinder adjusting mechanism and remote controldevices for said electrically operable means.

It is also an object of this invention to provide improvements inprinting machines of generally \improved construction, whereby thedevice will be simple, durable and inexpensive in construction, as wellas convenient, practical, serviceable and efficient in its use.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts, and in the details of construction hereinafterdescribed and claimed.

The preferred embodiment of the invention is illustrated in theaccompanying drawings, where- Figure 1 is an end view of an adjustingmechanism, embodying features of this invention, applied at one end of acylinder and which is adapt- 5 ed to be operated remote therefrom, torotatively adjust thecylinder in respect to its driving means;

Figure 2 is a section on line 2--2 of Figure 1;

Figure 3 is a section of an adjusting mechanism, embodying features ofthis invention, applied to the other end of a form cylinder, associatedwith which is the driving means for an ink roller and the means forvibrating the roller, and which is adapted to be operated remotetherefrom, to axially adjust the cylinder in respect to 15 itsassociated parts;

Figure 4 is a section on line 4-4 of Figure 3;

Figure 5 is an end view of a somewhat modified form of cylinder rotatlveadjusting mechanism;

Figure 6 is a section on line 5-6 of Figure 5;

Figure 7 is a partial section on line I of Figure 5;

Figure 8 is a partial section on line 8 of Figure 6;

Figure 9 is a top View of a cylinder showing the disposition of theadjusting means of this invention in respect thereto;

Figured!) is a schematic diagram of the electric circuits involved inthe use of the mechanism shown in these drawings; and 30 Figure 11 is apartial side view of another modified form of rotative adjustingmechanism.

Referring first to Figure 9, it will be understood that the cylinder Itmay represent a form cylinder of a printing machine having a shaft lljournaled in, and extending between, machine frame members 12. The shaftII is driven by a gear B3 in mesh with a gear l5, disposed in a casingl4 secured to the machine frame member I! at one end of the cylinder.The cylinder I0, 40

as is well understood, cooperates with an impression' cylinder (notshown) and between which a web of material to be printed upon passes.From here the web passes between similar pairs of cylinders and onthrough the printing machine to a position known as the delivery end ofthe machine, at which position the completely printed product isdelivered from the machine. I

Referring to Figures 1 and 2, the shaft Ii is driven by the gear l3through a composite gear I5, which although shown as being in two partsis to be considered for the purposes of this description as being asingle part gear. The gear i5 is mounted for free rotation upon a sleevel6 which is shown secured to shaft .H by a key chine. When it is desiredto rotatively advance or shown formed as a part of, to a sleeve 48 whichII. The gear I5 is connected to the sleeve [6 to drive the shaft II inthe forward direction by means'of a bracket-like arm l6 formed on thesleeve l6 and having a bore 18 formed in a cylindrical member 2|thereof, in which is slidably mounted a nonrotatable stud shaft 22,which extends beyond the member 2l at each end thereof, being keyed tothe arm l8 and having a nut 23 threaded upon end and engaging a shoe 24at the other end, the shoe 24 in turn engaging a boss 25 formed on anend face of the gear [5.

The stud shaft 22 is provided with threads upon an intermediate portionthereof within the bore E8 of the member 2 I, which threaded portion ispositioned within the bore of a rotatable wormwheel 26 carried by thearm 18. Threads formed in the bore of the worm-wheel 26 cooperate withthe threads on the shaft 22 to rotatively move the gear 45 and thesleeve iirelatively to each other in either direction depending upon thedirection of rotation of worm-wheel 26. The wormwheel 26 is rotatablydisposed between opposing shoulders 21 and 28 provided on the member 2|.

Another arm 3| is provided on the sleeve l6 and has a hollow member 32thereon in which is mounted a cylindrical shell 33. A plunger 34 isslidably mounted in the shell 33 and is urged therefrom into engagementwith a lug 35, formed on the gear l5, by a spring 36. The spring 36 actsbetween a shoulder 31 formed on the plunger 34 and a closed end 38 ofthe shell 33. The spring pressed plunger 34 constantly urges the gear ISin the rotative direction to insure positive contact of the lug 25 withthe shoe 24 and to prevent loose motion between the same, the shaft 22and the worm-wheel 26. The worm-wheel'26 is in mesh with a worm 4|, theshaft 42 of which is journaled in arm l8 and extends parallel with thecylinder shafe I I beyond one end of the sleeve [6. A gear 43 is securedto the extended end of a worm shaft 42by a key 44 and a nut 45 threadedon the end of the shaft 42. g

The above described mechanism is all enclosed in the casing l4 andrevolves with the cylinder l8 about the axis of the shaft II insynchronism with the other moving parts of the printing mathat pinions46, 4'! and 54 with their respective shafts all rotate with the bracket5| and the sleeve l6 under normal conditions.

A brake drum herein in the form of a sheave solenoids 68 and 69. Aspring 10 is provided and disposed between the plunger 61 and the freeend of the arm to take up lost motion and to maintainthe parts inoperative position. Energization of either solenoid will actuate itsplunger 61 to rock the lever 62 connected thereto and. press one of thebrake shoes into braking engagement with one of the sheaves within thegroove thereof. Herein the solenoids 66 and 69 are arranged to actuatethe cooperating parts2 to cause the brake shoes 58 and 59 respectivelyto engage in the grooves of sheaves 56 and 51 respectively.- Thesolenoids 68 and 69 may be energized by the actuation of push buttonswitches II and 72 respectively, as shown in Figure 10. The push buttonswitches II and 12 may be conveniently located at any desired positionabout the printing machine, preferably at a point where the machineoperator can readily observe the register of the printed matter, forinstance, at the delivery end of the machine.

Energization of solenoid 68, by actuation of push button switch II willthrough the instrumentality of the plunger 61, the link 66, the spring16, and the lever- 62 press the "brake shoe .4 58 into brakingengagement within the groove of the sheave 56. This action preventsfurther revolution of pinion 46 about the axis of the cylinder shaft IIwith the bracket 5| and sleeve l6. and due to the continuation of therevolution of 'thegear 43 about the axis of the cylinder shaft II and ofit being in mesh with the pinion 46; gear 43 will be rotated about itsown axis and. thereby revolve the worm-wheel 26 about the stud shaft 22to rotatively adjust the gear II! by advancing it relatively to thesleeve l6'and the cylinder I 8.

In like manner, energization of solenoid 69 by actuation of the pushbutton switch 12 will actuate the brake shoe 59 to prevent revolution of2 pinions 41 and 54 about the axis of shaft II with bracket 5| and vel6, and revolve the wormwheel 26 in n ther direction about the studshaft 22 to rotat vely adjust the gear l5 by receding it relatively tothe cylinder Hi. In the above manextends axially with respect to thecylinder shaft n r r tiv dj stm t of t d r l l ll outwardly through thcasing ll, being j ur-jdv'ely to the machine parts cooperatingtherenaled in a bearing 49 formed on abracketij w my be accomplishedfrom a emote posisuitably secured to the sleeve l6 and rotatable andregister of the Printed matter may be therewith about the axis of shaftII. The pinion 41 is supported upon a stud shaft 52"secured in andextending from a, boss 53 formed on the bracket 5|, and is also in meshwith a pinion 54. The pinion 54 is connected to, herein shown formedintegral with, a shaft 55 which extends through and is journaled in thesleeve 48; At its outer end the shaft 55 is provided with suitablewrench or other tool engaging faces whereby it may be manually actuatedif desired to cause rotation of the gear 43. It will be understoodrecede the cylinder I 8 in respect to-a cylinder cooperatingtherewith inorder to correct the register of the printed matter, the gear l5 and thecylinder shaft I I must be rotated relatively to each other in theproper direction. This may be accomplished by rotation of the gear 43whereby the worm-wheel 26 will be rotated upon the threaded portion ofthe stud shaft 22 toswin the gear l5 rotatively about the sleeve 16.Gear 43 is herein adapted to be rotated with the worm 4! by being inmesh with a pinion 46 and an idler pinion 41. Pinion 46 is connected,herein with the machine operation.

The mechanism for axially adjusting the cylinder l8, shown in Figures 3'and 4, comprises a' spindle 14, one end of which is secured by meansedthereon to an end plate Tl of a closed bearing supporting sleeve 18 inwhich the shaft H is iournaled. The sleeve fl! is mounted in the machineframe-member II for axial movement relfl 56 is keyed to the sleeve 48and a brake drum 5 secured to the plunger 61 of one or the other of 15continuously maintained without interfering 435 v of a collar 15 formedthereon and a nut 16 threadtively thereto and the'shaft .II isrotatively fixed to the sleeve for axial movement therewith, one portion18 of the roller bearing being secured to the end of shaft II by an endclamping member 8I and the other portion 82 of the roller bearing being.secured to, and in the sleeve, by the end plate 11 which clamps itagainst an internal shoulder 83 formed in the sleeve.

A cover plate 84 secured to the frame member I2 is provided and has asleeve portion 85 extending axially therefrom through which the spindle14 extends and is secured thereto by a key 88 to prevent it rotatingrelatively to the shaft v II or the sleeve 18 but axially slidable withthe shaft and sleeve relatively to the cover plate 84. A spring 81 isprovided which is disposed about the spindle 14 and has one end inabutment with the collar and the other end in abutment with a shoulder88 formed on the sleeve portion 85, whereby due to the tension of thespring 81, the

shaft II through its connection with the spindle,

as above described, is constantly urged axially in one direction.

The spindle 14 extends beyond the outer end of the sleeve portion 85,whereat it is reduced in diameter and threaded to receive an internallythreaded worm-wheel 89 which abuts the outer end of the sleeve portion85. Rotation of the worm-wheel 89 in one direction, due to it abuttingthe end of the sleeve portion 85, will pull the spindle 14 and with itthe shaft II,through the connecting parts, end plate 11, hearing sleeve18, roller bearing portions 82 and 18, and the end clamping member 8i,against the tension of the spring 81 in one direction to adjust thecylinder I8 axially in one direction to correct improper register oralignment of the printed matter in the machine. Rotation of theworm-wheel in the other direction will release the shaft II and permitits movement axially in the other'direction by the spring 81 to adjustthe cylinder i8 axially in the other direction. A collar Qi is se-'cured to the outer end of the threaded portion of the spindle M to limitthe movement of the same, and shaft II in the direction of the movementthereof given them by the spring 81 during to the shaft 95 and in meshwith the worm-wheel 89. The motor 92, referring to Figure 10, may beenergized from a remote position, preferably one from which register ofthe printed matter may be readily observed, such as at the delivery endof the machine by push button switches 81 and 88, one acting through asuitable electric control 88 to cause the motor 92 to rotate in onedirection and the other to cause rotation of the motor in the otherdirection.

In this instance, the sleeve portion 85 forms a bearing support for aseparately driven gear I from which an ink roller (not shown) is driven.The driven gear I has a hollow hub extension I42, upon which is formedhelical gear teeth I43, which are yin mesh with the teeth of a helicalgear I44 connected by a shaft I45 to the ink roller reciprocatingmechanism (not shown)- A casing I48 secured to frame member I2 isprovided to cover the above described parts and upon which the motor 82is mounted.

By the use of the mechanism shown in Figures 1 and 2, the arcuate rangeof the rotative adjustment of the cylinder I8 is somewhat limited. Wherea greater arcuate range of such adjustment is desired, the form ofmechanism shown in Figures. 5-8 inclusive may be provided. In this formthe cylinder shaft II, has mounted thereon and keyed thereto a sleeveI8I having a recessed extending portion I82 upon the periphery of whichworm-wheel teeth I88 are formed. A plate I84 fastened to the end of thecylinder shaft II and to the sleeve I8I retains the sleeve on the end ofthe shaft. A hollow, generally cylindrical, bracket I85 is secured tothe end face of the gear I5, which, in this instance, is rotatablymounted upon the sleeve I 8|. Mounted on the bracket I85 is a'worm I88,the shaft I81 of which is journaled at one end in a bearing lug I88formed on the bracket I85 and at the other end in a bearing I89pivoted'to an arm of a lever III in turn pivoted at I I2 to the bracketI85. The other arm of the lever III is arranged to be continuously urgedaway from the bracket I85 by a spring I I3 whereby the worm I88 ismaintained in proper mesh and with no backlash with the worm-wheel teethI83.

A worm-wheel H4 is secured to an end of the shaft I81 extending beyondthe bearing lug I88, and is continuously-urged against the same by aspring I I5 acting between the worm-wheel H4 and a nut I I8 threaded inthe shaft end. A worm III in mesh with the worm-wheel H4 is secured toone end of a shaft II8 which is journaled in a bearing H8 formed on thebracket I85, and extends therefrom to have a worm-wheel I2I secured uponits other end. The worm-wheel i2l meshes with a worm I22 formed on ashaft I28 which is journaled in the end face I24 of the bracket I85 andhas a pinion I25 secured to its inner end.

The bracket I85 has a hollow hub I28 extending therefrom through the endwall I21 of a casing I28 provided to cover the above described parts andto support the solenoids 88 and 88 and the associated parts actuatedthereby consisting of the plungers 81, the levers 82, links 85, andbrake shoes 58 and 58. The brake shoes 58 and 58 as in the previous formare adapted to engage in the grooves of sheaves 58 and 51 respectively.The sheaves 58 and 51 are secured to the outer ends of the sleeve 48 andthe shaft 55 respectively. The sleeve. in this instance is iournaled inthe hollow hub I28 and the shaft 55, as before, is iournaled in thesleeve 48. As in the previously described form, a pinion 48 is securedupon the inner end of the sleeve 48 and a pinion 54 is secured upontheinner end of the shaft 55. The idler gear 81 meshing with the pinion 58in this instance is rotatively supported upon the bracket I85 at I28.The pinion I25 is in mesh with both pinions 48 and 41.

In similarity with the operation of the previously described form shown.in Figures 1 and 2, selective energization of' solenoids 88 and 88 willapply a braking action upon either sheaves 58 or 51, whereby eitherpinion 48 or 41 will be restrained from revolving about the axis of theshaft II and, therefore, continued revolution of the gear I 5 and thebracket I85 about the toothed sleeve I8I and the axis of the shaft II,will rotate the pinion I25 with its shaft I23 and the worm I22. Rotationof the pinion I25 and the worm I22 through the instrumentality of thewormwheel I2I, the worm I I1, the worm-wheel H4, and the worm I88, willrotatively adjust the cylinder shaft I I and the gear I5 relatively toeach other iii) in either direction depending upon which of thesolenoids is energized. By the use of the mechanism shown in Figures 5--8 inclusive such adjustment may be made over a range of- 360 shouldoccasion demand'the same, thereby permitting, if required, theadjustment of the cylinder II one complete revolution in respect to acooperating cylinder or other machine part.

In the form shown in Figure 11, a reversible electric motor I5I isdirectly connected to the shaft 55 of the form shown in Figure 6 by asuitable coupling I52. In this instance, the gear 46 is secured to theshaft 55 and may be rotated in either direction by the motor I5I whenthe same is actuated. The motor I5I has a sleeve like bracket I53secured to the end of its casing. The bracket I53 fits over the end ofthe hollow hub I26 and is secured thereto by a screw I54. Contact ringsI55, I56 and I51 aremounted upon an insulating ring I58 which is securedto the bracket I53. Brushes I59, IN and I62 connected to a motor controlbox (not shown) by suitable conductors are mounted on a bracket I63secured to the casing I21 and respectively contact the rings I55, I56and I5! to properly energize the motor I 5|. By this arrangement thegear I25 may be rotated in-either direction by the motor |5I to adjustthe cylinder shaft II and the gear I5 relatively to each other in eitherdirection. While the motor I5I is shown in Figure 11 as being connectedto the shaft 55 and through gears 46 and I25 to actuate the parts shownin Figure 6, it is obvious that it could beassociated with the parts ofthe form shown in Figure 2 to rotate gear 43 through gear 46 and therebyobtain the results desired in the use of that form.

By the provision, in a printing machine, of the above described rotativeandaxial adjusting means fora cylinder, an operator may adjust acylinder either axially or rotatively or adjust it both wayssubstantially simultaneously, while the machine is in operation andcontinuallymaintain the printed matter in register longitudinally,laterally or diagonally in respect to the printed sheet. Theseoperations can be accomplished by an' operator positioned remote fromthe cylinder at a position from which the printed sheet is clearlyvisible. I

It will be understood that the invention may be embodied in otherspecific forms without departing from the spirit or essential attributesthereof, and'it is therefore desired that the present embodiment beconsidered in all respects as illustrative and not restrictive, and itwill be further understood tha each and every novel feature andcombination present in or possessed by the mech-.

anism herein disclosed forms a part of the invention included in thisapplication.

What I claim is:

1. In a printing machine, a rotatable cylinder, means to adjust saidcylinder axially, said means including a spindle secured to andextending axially from said cylinder, said spindle having threads formedthereon, a worm-wheel on said spindle cooperating with said threads toaxially move said spindle when rotated, means to rotate said worm-wheelin" either direction, and means to control said worm-wheel rotatingmeans from a position remote'from said cylinder.

2. In mechanism to axially move a rotatably mounted cylinder, a spindlesecured to and extending from saidv cylinder, and being relativelyrotatable in respect thereto, said spindle having threads thereon, amember rotatably mounted on said spindle and having threads cooperatingwith the threads on the spindle to move the same, and with it thecylinder, axially in one direction when the member is rotated in onedirection, and a spring arranged to urge said spindle and cylinderaxially in the other directionwhen said member is rotated in the otherdirection.

3. In a printing machine, a cylindrical mem-' her, a driving gearmember, mechanism operably interposed between said members to rotativelyadjust one of said members relatively to the other member and includingcooperating relatively rotatable elements, a yieldable member forbiasing one element for operable engagement with another elementto-prevent backlash, and means actuated by the rotation of thecylindrical member to rotate certain of said elements relatively toanother, i

4. In a printing machine, a cylinder, a cylinder driving gear, mechanismfor rotatively adjusting said gear relatively to said cylinder andincluding a pair of cooperating elements, a first of said elementsengaging a part on said gear and being adapted to move axially to rotatethe gear relatively to the cylinder, and the second of said elementsbeingrotatably mounted on the first element and adapted to move itaxially, and yieldable means for biasing the axialw-movable firstelement into engagement with the said part of the gear.

5. In a printing machine, a cylinder, a cylinder driving gear, a sleevesecured for rotation with the said cylinder and upon which said gear isrotatably mounted, mechanism to rotatably adjust said gear relatively tosaid .cylinder and including gear teeth on the periphery of said sleeve,a bracket secured to said gear, a sleeve driving gear having teeth inmesh with the teeth on saidsleeve and being mounted on said bracket,said pinion having a shaft journaledin said bracket sleeve, means torotate said pinion shaft, and

gearing carried by'said bracket and connecting said sleeve driving gearand said pinion, and

yieldable anti-backlash components interposed in the said mechanism forrotatively adjusting said gear relative to said cylinder.

6. In a printing machine, a cylinder, a cylinder driving gear, a sleevesecured for rotation with the said cylinder and upon which said gear isrotatably mounted,'mechanism to rotatably adjust said gearrelatively tosaid cylinder and including gear teeth on the periphery of said sleeve,a bracket secured to said gear, a sleeve driving gear having teethyieldingly in mesh with the teeth on said sleeve and being mounted onsaid bracket, said bracket having a sleeve extending therefrom, a pinionhaving a shaft journaled in said bracket sleeve, an electric motorsecured to, and carried by, said bracket sleeve and having its shaftconnected to said pinion shaft, andgearing carried by said bracket andconnecting said sleeve driving a gear and said pinion.

7 In a printing machine, a cylinder, a cylinder driving gear, a sleevesecured for rotation with the said cylinder and upon which said gear isrotatably mounted, mechanism to rotatably adjust said gear relativelytosaid cylinder and including gear teeth on the periphery of said sleeve,

a bracket secured to said gear, a sleeve driving gear having teeth inmesh with the teeth on said sleeve and being mounted on said bracket,means for yieldably maintaining the sleeve driving gear in mesh with theteeth;on the sleeve, said bracket bracket sleeve, a second pinion havinga shaft journaled in said hollow shaft, a brake drum connected to eachshaft, and gearing carried by said bracket and connecting-said first andsecond pinions to said sleeve driving gear 8. In a printing machine, acylinder member, a driven member, means operably interposed between thecylinder member and drlven'member to drivingly connect said drivenmember to said cylinder member and including separate relatively movablecooperating components, one of the components being supported by onemember and axially movable to engage the other member to augularly movethe members relative to each other, and yieldable means operablyinterposed between the said members to constantly bias the axiallymovable component into engagement with the said other member to permitthe adjusting movement of the said members relative to each other toprevent backlash in the adjusting mechanism.

9. In a printing machine, a cylinder, a driven member, means operablyinterposed between the cylinder and driven member to drivingly connectsaid driven member to said cylinder and including a pair of elements,one of said elements being axially movable and engaging the drivenmember and the other element rotatably mounted upon the axially-movableelement and cooperating therewith to axially move it, theaxially-movable member being supported for movement with the cylinderand engaging the driven member so that axial movement of theaxially-movable member rotatably adjusts said cylinder and said-drivenmember relative to each other, a gear connected to said rotatableelement, a pair of pinions drivingly connected to said gear, the axis ofsaid pinion being in alinement with the axis of said cylinder, a gearbeing mounted for rotation bodily about the axis of said pinion,separate brake means for selectively engaging said pinions, means toselectively actuate either of said brake means to prevent rotation ofthe pinion connected thereto, and yieldable means operably interposedbetween the cylinder and driven member to constantly bias theaxially-movable member into engagement with the driven member.

10. In a printing machine, a cylinder, a driven member, means operablyinterposed between the cylinder and driven member to drivingly connectthe cylinder and driven member and including an axially-movable member,a member rotatable relative to the axially-movable member andcooperating therewith to axially move the axiallymovable member, aterminal of the axially-movable member engaging the driven member torotatably move the driven member relative to the cylinder, meansengageable from a point exterior of the cylinder and operable by themovement of the cylinder to actuate the said rotatable member, and meansinterposed between the cylinder and rotatable member to constantly biasthe axially-movable member to engagement with the driven member so thataxial movement of the axially-movable member adjustably moves thecylinder in angular relation to the driven member.

11. In a printing machine, a cylinder, a driven member, means operablyinterposed between the cylinder and driven member to drivingly connectthe cylinder and driven member and including an axially-movable member,a member rotatable relative to the axially-movable member andcooperating therewith to axially move the anallymovable member, aterminal oi the axially-movable member engaging the driven member torotatably move the driven member relative to the cylinder, a gearoperably connected with the said rotatable member, a pair of pinionsdrivingly connected to said gear, said gear being mounted for rotationbodily about the axis of said pinions, a brake drum connected to eachpinion, a brake shoe cooperating with each of said drums, and meansinterposed between the cylinder and rotatable member to constantly biasthe axially-movable member to engagement with the driven -member so thataxial movement of the axiallymovable member adjustably moves thecylinder in angular relation to the driven member.

12. In a printing machine, a form cylinder rotatable in an axiallymovable bearing constructed and arranged to hold the cylinder againstaxial movement relative thereto, the bearing having a rotatable part anda non-rotatable part, an adjusting mechanism including an axiallymovable non-rotatable adjusting member operably connected to thenon-rotatable part of the bearing, means to move the adjustable memherand thereby the bearing and cylinder axially in one direction, andresilient means engaging the said adjusting member to bias the adjustingmember and thereby the bearing and cylinder in the opposite direction toprevent backlash in the adjusting mechanism.

13. In a printing machine, a cylinder, a cylinder driving gear supportedwith the cylinder and augularly adjustable relative thereto, a worm gearfixed relative to the cylinder and rotatable therewith, a worm rotatablysupported by the said cylinder gear in mesh with the worm gear, andyieldable means for normally biasing the worm towards meshing relationwith the worm gear.

WIIILIAM F. HUCK.

